Originally Posted by troutman
Hydrogen peroxide on leaves will burn them. Water the soil or grow medium and not the plants.
3% right out of bottle will shrivel pistils, yes, maybe even burn leaves.
A solution of up to 1 % will not have any adverse effects in my experience.
H2O2 is useful to buy a couple of days to find a better solution or spot treat in between other treatments. Also useful to get you through the last week of flowering.